@article{DAN_1970_191_6_a3,
     author = {I. I. Golichev},
     title = {The discreteness of the spectrum of nonselfadjoint operators},
     journal = {Doklady Akademii Nauk},
     pages = {1212--1215},
     publisher = {mathdoc},
     volume = {191},
     number = {6},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_191_6_a3/}
}